Measurement and Modelling of a High Power Amplifier for the Integration in MIMO-OFDM System Simulations
نویسندگان
چکیده
Future mobile communication systems will be based on a combination of MIMO and OFDM. For the design of MIMO techniques system simulations are an important tool, if they accurately predict behaviour in reality. For the realistic inclusion of high power amplifier (HPA) behaviour, this paper describes a measurement procedure as well as the adaptation to behavioural modeling. The amplifier model is then applied to a comprehensive MIMO OFDM system simulation. The effect of saturation and nonlinearity of the HPA on bit error performance of a MIMO OFDM system is investigated. It is shown that due to the sensitivity of OFDM to clipping the design of the HPA is critical, however the requirements can be relaxed by combining OFDM with MIMO.
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